#include <iostream>
using namespace std;

class Person
{
	friend ostream& operator<<(ostream& out, Person& p);
public:
	Person()
	{
		m_Age = 0;
	}
private:
	int m_Age;
};
ostream& operator<<(ostream& out, Person& p)
{
	out << p.m_Age;
	return out;
}
//int main()
//{
//	Person p;
//	cout << p << endl;
//	return 0;
//}